CN110009996A - Bonding part and flexible display screen - Google Patents
Bonding part and flexible display screen Download PDFInfo
- Publication number
- CN110009996A CN110009996A CN201811404763.7A CN201811404763A CN110009996A CN 110009996 A CN110009996 A CN 110009996A CN 201811404763 A CN201811404763 A CN 201811404763A CN 110009996 A CN110009996 A CN 110009996A
- Authority
- CN
- China
- Prior art keywords
- bonding part
- adhesive layer
- metal plate
- cavity
- display panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 79
- 239000002184 metal Substances 0.000 claims abstract description 79
- 239000012790 adhesive layer Substances 0.000 claims description 81
- 238000006386 neutralization reaction Methods 0.000 claims description 12
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000004709 Chlorinated polyethylene Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 33
- 239000000463 material Substances 0.000 description 21
- 239000000758 substrate Substances 0.000 description 13
- 230000008859 change Effects 0.000 description 11
- 239000010935 stainless steel Substances 0.000 description 10
- 229910001220 stainless steel Inorganic materials 0.000 description 10
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000005452 bending Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000010408 film Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000012792 core layer Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
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- 229910052759 nickel Inorganic materials 0.000 description 3
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- 239000004814 polyurethane Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
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- 229910052726 zirconium Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- -1 acrylic ester compound Chemical class 0.000 description 2
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- 150000001336 alkenes Chemical class 0.000 description 2
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- HIFVAOIJYDXIJG-UHFFFAOYSA-N benzylbenzene;isocyanic acid Chemical class N=C=O.N=C=O.C=1C=CC=CC=1CC1=CC=CC=C1 HIFVAOIJYDXIJG-UHFFFAOYSA-N 0.000 description 2
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- 238000003786 synthesis reaction Methods 0.000 description 2
- UWHCKJMYHZGTIT-UHFFFAOYSA-N tetraethylene glycol Chemical class OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 2
- GNEPLYVYORHREW-UHFFFAOYSA-N 1,1,3,3,6-pentamethyl-7-nitro-2h-inden-5-amine Chemical compound CC1=C(N)C=C2C(C)(C)CC(C)(C)C2=C1[N+]([O-])=O GNEPLYVYORHREW-UHFFFAOYSA-N 0.000 description 1
- XLPJNCYCZORXHG-UHFFFAOYSA-N 1-morpholin-4-ylprop-2-en-1-one Chemical class C=CC(=O)N1CCOCC1 XLPJNCYCZORXHG-UHFFFAOYSA-N 0.000 description 1
- RZVINYQDSSQUKO-UHFFFAOYSA-N 2-phenoxyethyl prop-2-enoate Chemical class C=CC(=O)OCCOC1=CC=CC=C1 RZVINYQDSSQUKO-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 150000004657 carbamic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- MPQXHAGKBWFSNV-UHFFFAOYSA-N oxidophosphanium Chemical class [PH3]=O MPQXHAGKBWFSNV-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
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- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
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- B32—LAYERED PRODUCTS
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
- B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
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- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
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- C—CHEMISTRY; METALLURGY
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/28—Metal sheet
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
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- H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
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- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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Abstract
The present invention provides a kind of bonding part, including metal plate, wherein, the metal plate has mutually opposite first surface and second surface, a plurality of cavities are arranged in the metal plate between the first surface and the second surface, so that being formed in multiple between the first surface and the second surface and face when folding.The present invention also provides the flexible display screens including bonding part.According to the present invention, bonding part can be avoided upon deployment deforms and can easily be restored to reset condition.
Description
This application claims the preferential of the No.10-2017-0163548 South Korea patent application submitted on November 30th, 2017
Power, the Korean application is by reference to being completely incorporated herein.
Technical field
The present invention relates to flexible display screens, even if rolling over repeatedly more particularly, to by changing endo conformation and material
Can prevent from separating at the interface with adhesive layer after folded and be easy to be restored to reset condition bonding part and including
The flexible display screen of this bonding part.
Background technique
For showing that the image display panel of various information is the core technology of information-technology age and is opened on the screen
Send out into thinner and lighter and more multi-functional form.These requirements are responded, can spontaneously shine and thus not need light source list
The organic diode etc. of member has attracted more note that because panel display apparatus can reduce weight and volume, weight and body
The shortcomings that product is cathode-ray tube.
Organic light-emitting display device is by showing image at multiple pixels of matrix arrangement.Each pixel includes shining
Element and pixel-driving circuit, pixel-driving circuit include the multiple transistors for being operating independently light-emitting component.
Meanwhile recently, for various applications, to can easily carry in pocket or pouch and with it is portable aobvious
Showing device is compared can show that the flexible display screen of image has the demand of increase on more large screen.It is soft when being carried or storing
Property display screen is partially folded or is bent, and they are opened when displaying an image so that image display area be capable of increasing,
And more true image can be provided the user with.
By reducing the thickness of substrate, image is shown in display panel above can be thinning.
In addition, flexible display screen includes being arranged below foldable or flexible flexible display panels to support display surface
It is simultaneously installed backboard in the housing by plate.Display panel and backboard are manufactured by different technique, since they are all without viscous
Property, they can be bonded together by the bonding part being disposed there between.
In this respect, it is made due to conventional binder portion of the plastic material of such as rubber, after heat or photocuring,
They keep solidifying and thus there are problems that being folding or bending over for display panel cannot be properly responded to.In addition, when bonding
When portion is made by controlling its rigidity of material flexible similar with display panel or backboard, there are such problems: bonding
Portion only applies adhesion strength on the surface that display panel and backboard are contacted with bonding part, allows them to through high gravitation quilt
It is bonded together, but the opposed surface of bonding part is deformed due to length difference in change, when in the operating process such as folded
When generating the different gravitation for such as shrinking or expanding, bonding part cannot be restored to reset condition
The folded state of flexible display screen explained below according to comparative example.
Fig. 1 is the cross-sectional view for showing the folded state of the flexible display screen according to comparative example.
As shown in Figure 1, including display panel 10 and backboard 20 according to the flexible display screen of comparative example, they are by setting
The bonding part 15 set between their whole surfaces is bonded together.In that case, when flexible display screen is folded in half
When, the backboard 20 for being folded in the display panel 10 of inside and being folded in outside has different radius of curvature in fold domain.Cause
This, display panel 10 and backboard 20 are overlapped in non-folded state and have identical size, and in folded state, 10 quilt of display panel
Compression, backboard 20 are expanded, and have different radius of curvature, and the non-folding at both ends corresponding with expansion in fold domain
Folded region forms the region that there is the backboard 20 of more larger radius of curvature and display panel 10 not to overlap.This phenomenon is referred to as display surface
" slippage " between plate 10 and backboard 20.
In addition, in this folding operation, the of the bonding part 15 contacted respectively with display panel 10 and backboard 20
One surface and second surface have strain m in their opposite end due to the difference of adhesive surface.Overall strain at both ends
2m is defined as the folded length difference between first surface and second surface.
When distance (radius of curvature) quilt of the first surface at the center from the fold domain of display panel 10 to bonding part 15
It is set as " R ", fold domain has semi-circular cross-section.For this purpose, fold domain is in the first surface contacted with display panel 10
On length it is corresponding " π R ".In addition, the thickness when bonding part 15 is set to " d ", fold domain is viscous what is contacted with backboard 20
Length on the second surface in conjunction portion 15 is corresponding " π (R+d) ".Therefore, equation 2m=π (R+d)-π R is obtained.
If bonding part 15 is arranged in the whole surface between display panel 10 and backboard 20, and is had and display
Panel 10 or the similar flexibility of backboard 20, as the flexible display screen according to comparative example, when the display screen of folding is by again
Secondary opening (expansion), bonding part are difficult to be restored to reset condition.In this case it is necessary to which the long period keeps flexible display screen extensive
Its reset condition or impossible unfolded region are arrived again and thus revert to original planar flexible display screen.
Meanwhile by improving its rigidity, according to the aforementioned full surface type bonding part of the flexible display screen of comparative example
Its reset condition can be easily restored to.It is disadvantageously, relatively soft due to being applied to but when the rigidity of bonding part is too strong
Property display panel increasing stress, it is folding and expansion when display panel may crack.In addition, having reduced rigidity
Full surface type bonding part need when being unfolded after folding the too long time to be restored to original from the state that 2m is strained occurs
Beginning state.The tack at interface between the display panel and backboard contacted with bonding part, thus it is unfavorable be cannot
Suitable for various devices.
In addition, being slipped in the case where common polymer bonding part when due to being folded between two adherends
When, there is length variation between the inner surface and outer surface of common polymer bonding part, and thus be left permanent change
Shape.Therefore, stress is folded once removing, between two surfaces in the polymer-bonded portion between the adherend being mutually flush
Difference in length be observed to bending, wrinkle or deformation on the certain parts of flexible display screen, and for observer by
Regard defect as.
Summary of the invention
Therefore, present invention is generally directed to bonding part and including the flexible display panel of the bonding part, they are substantially avoided due to existing
There is one or more problem caused by the limitation and disadvantage of technology.
The object of the present invention is to provide bonding parts, by making to have predetermined elasticity modulus and not will lead to plastic deformation
Metal plate is patterned and is obtained, so that the material property due to metal plate forms multiple neutralization faces with when being patterned in folding, from
And it prevents bonding part from deforming and bonding part is made to be easy to be restored to its reset condition upon deployment.
Other advantage of the invention, object and feature will partly propose in following description and for this
It part will be apparent or can know from the practice of the present invention in understanding following content for the technical staff of field.This
The purposes and other advantages of invention can be by the structure that particularly points out in following written description and claims and attached drawing
To be achieved and obtained.
According to an aspect of the present invention, a kind of bonding part, including metal plate are provided, wherein the metal plate has mutual
Opposite first surface and second surface, a plurality of cavities are arranged on described between the first surface and the second surface
In metal plate, so that being formed in multiple between the first surface and the second surface and face when folding.
Optionally, the metal plate has scheduled elasticity modulus, and not will lead to plastic deformation.
Optionally, the metal plate is liquid metal plate of the elasticity modulus in 10GPa to 100GPa.
Optionally, the bonding part further include be arranged in the first adhesive layer on the metal plate or in the metal plate and
At least one of second adhesive layer.
Optionally, first adhesive layer and second adhesive layer are respectively set at described the first of the metal plate
On surface and the second surface.
Optionally, first adhesive layer and second adhesive layer are provided in the form of piece；First adhesive layer
The metal plate reservation on the first surface and the second surface is formed only into second adhesive layer but excludes institute
State the region of cavity；Or one in first adhesive layer and second adhesive layer in the form of piece and another
In the sheet for excluding the cavity.
Optionally, first adhesive layer is set on the first surface, and second adhesive layer fills the sky
Chamber；Or first adhesive layer is set on the first surface, second adhesive layer is filled the cavity and is set
It sets on the second surface.
Optionally, the multiple cavity is provided only on region corresponding with the fold domain, and first bonding
Layer is provided in the remaining area.
Optionally, first adhesive layer and second adhesive layer include polyurethane acrylate resin or epoxy resin
As basic binder resin.
Optionally, the metal plate has the rigidity higher than first adhesive layer and second adhesive layer.
Optionally, the metal plate has about 10 μm to 20 μm of thickness, and described first in even shape is viscous
Layer and second adhesive layer are closed with about 3 μm to 7 μm of thickness.
Optionally, the plane of the cavity be in along folding axis it is shorter and along the direction intersected with folding axis compared with
Long dumbbell shape.
Optionally, the cavity is arranged to multiple column, the cavity in odd column and the sky in even column
Chamber interlocks and mutually partly overlaps.
Optionally, the bonding part is arranged between the display panel of flexible display screen and backboard so as to by the display
Panel and the backboard are bonded together and/or are provided at the coating and touch electrode battle array of the display panel of flexible display screen
Between column.
According to another aspect of the present invention, a kind of flexible display screen is provided, including display panel, backboard and as described above
Bonding part.
Optionally, the bonding part is arranged between the display panel and the backboard to bond them one
It rises and/or is provided between the coating and touch electrode array of display panel of flexible display screen.
It should be understood that the total description in present invention front and subsequent detailed description be schematically and exemplarily, and
It is intended for use in providing being explained further for claimed invention.
Figure of description
It is included to provide and of the invention further understand and include in this application and to constitute part of this application
Attached drawing show the embodiment of the present invention, and be used to explain the principle of the present invention together with specification.In attached drawing:
Fig. 1 is the cross-sectional view for showing the folded state of the flexible display screen according to comparative example；
Fig. 2 is the plan view for showing flexible display screen according to the present invention；
Fig. 3 is the cross-sectional view intercepted along the line I-I ' of Fig. 2；
Fig. 4 is the plan view for showing bonding part according to a first embodiment of the present invention；
Fig. 5 is the cross-sectional view intercepted along the line II-II ' of Fig. 4；
Fig. 6 is the curve for showing the strain-stress relation of the metal plate and other materials for bonding part of the invention；
Fig. 7 A is the cross-sectional view for showing bonding part according to a second embodiment of the present invention；
Fig. 7 B is to show the exemplary cross-sectional view of the variation of Fig. 7 A；
Fig. 7 C is to show the exemplary cross-sectional view of the variation of Fig. 5；
Fig. 8 A shows the neutralization face of full surface type bonding part；
Fig. 8 B shows the neutralization face of bonding part according to the present invention；
Fig. 9 is the plan view for showing bonding part according to a third embodiment of the present invention；And
Figure 10 is the cross-sectional view intercepted along the line III-III ' of Fig. 9.
Specific embodiment
It reference will now be made in detail to the preferred embodiment of the present invention below, the example of preferred embodiment is shown in the accompanying drawings.At this
Invention it is described below in, substantially the same element is denoted by the same reference numerals.In the following description, when with this hair
The detailed description of bright relevant known technology or configuration is considered as not necessarily making subject of the present invention unclear, is explained in detail
It will be omitted.In addition, the title using constituent element in the following description may be different from the division name of actual product, because
It for them is selected in view of the convenience for writing specification.
In addition, in describing the embodiments of the present, it should be understood that when an element or layer are referred to as being located at another element or layer
When "upper" or " top ", an element or layer can directly contact another element or layer, or one or more intermediary elements or
Layer can also be between the two elements or layer.In addition, when an element or layer are referred to as and another element or layer " contact "
When, one or more intermediary elements or layer are not present between the two elements or layer.
The size and thickness of each element are to show that in the accompanying drawings, the present invention need not be confined to them for ease of description
Size and thickness.
Hereinafter, describing the preferred embodiment of the present invention with reference to the accompanying drawings.
The display screen being shown below in embodiment indicates foldable display screen, but fold domain can be located at display screen
Any part.In flexible display screen according to the present invention, the position of the deformation of backboard in fold domain can be according to soft
The change of the fold domain of property display screen and change.In addition, flexible display screen according to the present invention is regardless of bending or fold domain
How, as long as it is flexible, it may also be referred to as " folding ", " flexible " or " can wind " etc..
Fig. 2 is the plan view for showing flexible display screen according to the present invention, and Fig. 3 is the cross intercepted along the line I-I ' of Fig. 2
Sectional view.
As shown in Figures 2 and 3, flexible display screen according to the present invention include display panel 100, towards display panel 100 simultaneously
And it supports the backboard 200 of the bottom of display panel 100 and is arranged in patterned between display panel 100 and backboard 200
Bonding part 1000.
Patterned bonding part 1000 include metal plate formed substrate in a plurality of cavities 505 and in following progress
Detailed description.Fig. 3 only shows the cross section of patterned bonding part 1000 and shows bonding part 1000, wherein empty
Chamber is spaced apart and is arranged in island form, excludes cavity 505, metal plate is integral form, as shown in Figure 4.
Here, when the direction of display panel 100 and the online I-I ' of backboard 200 is folded along fold domain (FR),
Fold domain FR, display panel 100 are compressed, and backboard 200 is expanded.In this case, cavity 505 is dispersed in pattern
In the bonding part 1000 of change, due to small between the first surface towards display panel 100 and the second surface towards backboard 200
Length variation, will not be plastically deformed.Specifically, metal plate 1000 is by the springform with 10GPa to 100GPa
The liquid metal plate of amount is made, and liquid metal plate with high intensity and has good compared with common metal and conventional binder portion
Good elasticity is without being plastically deformed.
Therefore, in relation to the display panel 100 and backboard 200 that mutually bond, when folding, as display panel 100 is pressed
Contracting and backboard 200 are expanded, and due to the stress on the direction opposite with first surface and second surface, generate bonding part
1000 compressive deformation and dilatating and deformable.When folding stress is removed, it is plastically deformed due to elastic recovery strength and not,
Display panel 100 and backboard 200 can easily be restored to its reset condition.
Meanwhile the display panel 100 of flexible display screen according to the present invention includes effective display area domain AA and non-display area
Domain NA, effective display area domain include multiple pixels positioned at the center of display panel 100, and non-display area surrounds effective display area
The periphery of domain AA.
In addition, display panel 100 includes substrate 101, including being arranged in each sub-pixel of effective display area domain AA
The encapsulated layer of the array 110 of thin film transistor (TFT) and Organic Light Emitting Diode, sealing thin film transistors and Organic Light Emitting Diode
120, the touch electrode array 130 on encapsulated layer 120 is set and protects the coating 140 of touch electrode array 130.?
Under some cases, bonding part 1000 of the invention be can be set between coating 140 and touch electrode array 130.
Substrate 101 and coating 140 can be with a thickness of 0.2mm or smaller thin glass or plastic foil, and even if
Shape can flexibly change without cracking when folding.In addition, it is contemplated that during light emission direction and formation array 110
Heat resistance, substrate 101 and coating 140 can be made from a different material.When light emits upwards, coating 140 can be by saturating
Bright polymer is made, and substrate 101 can be made of colored polyimides.
In addition, array 110 includes the multiple layers formed on the substrate 101, that is, insulating layer, metal layer and semiconductor layer,
And each layer hasOr smaller small thickness, thus will not deform and crack when folding.
In addition, encapsulated layer 120 has the multilayer structure of thin film formed by being arranged alternately above organic film and inoranic membrane, and
It is adequately coated the top and side surface for the array 110 being arranged in effective display area AA, to prevent outside moisture or air penetration
To array 110.That is, encapsulated layer 120 is formed on the substrate 101, other than the side of setting pad electrode (not shown), in base
There is the size bigger than effective display area domain AA on the edge of plate 101.In addition, the organic film and nothing that are arranged in encapsulated layer 120
The thickness of machine film is 3 μm respectively or smaller and 1 μm or smaller, and the overall thickness of encapsulated layer 120 is no more than about 20 μm, and by
In the relatively thick thickness of organic film, the topmost of encapsulated layer 120 can be subjected to planarizing.
In addition, touch electrode array 130 is formed directly on the surface of flat topmost of encapsulated layer 120, or additional
Inorganic protecting film be further disposed on encapsulated layer 120, allow to be arranged touch electrode array 130.In some cases,
After on the inner surface that touch electrode array 130 is formed in coating 140, touch electrode array 130 may be attached to packet
On the surface of sealing 120.
In addition, substrate 101 may include the pad portion that side is exposed from encapsulated layer 120.Multiple pad electrodes are set
In pad portion and pad electrode is connected to flexible printed circuit board 300.In addition, flexible printed circuit board 300 is by court
The bottom fold of substrate 101, and be finally accommodated in the structure of base portion (not shown).
Flexible printed circuit board 300 is by towards 200 folding of the bottom of the substrate 101 in final flexible display screen and backboard
It is folded.
Meanwhile being displayed in Fig. 2 although having with the backboard 200 of 101 similar thickness of substrate, backboard 200 is bearing base
The element of the lower part of plate 101 and the steel alloy including such as stainless steel or the plastic plate with high rigidity.In such case
Under, backboard 200 has the thickness of the whole thickness equal to or more than display panel 100.Further, since good rigidity and big
Thickness, stainless steel have the rigidity bigger than display panel 100, and multiple hole (not shown) are arranged on fold domain (FR), make
Spring is played the role of in the region that multiple holes must be provided with, and is more easier so that folding.
In addition, surface layer is arranged on the upper and lower part of the core layer in multiple holes including backboard 200, so that step can be with
It is compensated, and inner core layer can be against external impact.As shown, excluding multiple holes, backboard 200 has wherein core
The configuration that layer and the surface layer being disposed thereon in portion and lower part are integrated.But core layer is made of rigid stainless steel, and table
Layer is resin film or inorganic insulating membrane, it means that core layer and surface layer are made from a different material.
Patterned bonding part 1000 as shown in Figures 2 and 3 has rectangular cross section, but can have strain, this is answered
Become the different in width that can result in the part for corresponding to the surface for being respectively facing display panel 100 and backboard 200.Based on this figure
The shape of case is more by being formed when receiving stress when two opposite surfaces apply compression/expansionary force by folding etc.
A neutral surface disperses stress, to prevent from leading to the plastic deformation of patterned bonding part 1000 due to folding and help
In being restored to reset condition after folding.
Fig. 4 is the plan view for showing bonding part according to a first embodiment of the present invention, and Fig. 5 is the line II-II ' along Fig. 4
The cross-sectional view of interception.
As shown in Figures 4 and 5, bonding part 1000 according to a first embodiment of the present invention includes having mutually opposite first table
The metal plate 500 of face and second surface, the first adhesive layer 510 and the second adhesive layer 520, metal plate 500 have it is multiple regularly
The cavity 505 of setting and the elasticity modulus of 10GPa to 100GPa, the first adhesive layer 510 and the second adhesive layer 520 contact respectively
The first surface and second surface of metal plate 500.
Metal plate not instead of conventional conductive plate for bonding part of the invention, liquid metal plate, liquid metal plate are
The material that one kind is commonly used.Liquid metal plate be by zirconium and titanium, nickel or copper etc. are mixed and by mixture molding and
Being formed has the plate of predetermined thickness and manufactured.The title of liquid metal plate be because it have similar liquids soft surface and
Appropriate.That is, liquid metal plate is by mixing simultaneously zirconium with (not being the liquid parts as represented by title) such as titanium, nickel or copper
And mixture is quenched to prevent from wherein forming crystal grain and manufactured, therefore, it has good for its thickness
Elastic force and relative to it is known with the titanium of high rigidity for have high intensity.Metal plate may include with zirconium,
The alloy of at least one of titanium, nickel and copper, to control its elasticity modulus and intensity.Good elastic force and high intensity are not shown
It is obtained in common metal and due to having used certain materials of similar liquid metal plate.In addition, this characteristic and predetermined
It is dramatically different that permanent deformation is maintained at this respect in conventional polymer binder, conventional polymer binder include butyl rubber,
Butadiene-styrene rubber, neoprene, fluorubber or known with elastomeric silicon rubber.
Metal plate 500 for bonding part 1000 of the invention is by etching the metal plate with predetermined thickness regularly
Cavity 505 is formed to be patterned.Since cavity 505 is spaced from each other, even if the metal plate 500 for constituting bonding part 1000 is being formed
It is also possible to unitary form after cavity 505.
In addition, the first adhesive layer 510 and the second adhesive layer 520 are provided, for being bonded in metal plate in bonding part 1000
On 500 two surfaces corresponding with two adherends.As shown, the first adhesive layer 510 and the second adhesive layer 520 can be with
It is provided in the form of piece or the first adhesive layer 510 and the second adhesive layer 520 can be formed only into first surface and second
Retain metal plate 500 on surface and excludes in the region of cavity 505.In some cases, the first adhesive layer 510 and the second bonding
Only one in layer 520 can be in the form of piece, and another can be patterned into the cavity 505 for excluding metal plate 500
Shape.
In addition, the first adhesive layer 510 and the second adhesive layer 520 may include the polyurethane third as basic binder resin
Alkene acid ester resin or epoxy resin, base bond agent resin include a large amount of adhesive compositions.For example, for synthesis of polyurethane acrylic acid
Ester resin is as acrylic ester compound, according to 9 parts of N- acryloyl morpholines of weight percent, according to 8 part third of weight percent
Olefin(e) acid isobornyl thiocyanoacetate, according to 20 parts of 2- phenoxyethyl acrylates of weight percent, according to 20 parts of tetraethylene glycols two of weight percent
It acrylate and is added according to 10 parts of tetraethylene glycols of weight percent.In addition, for synthesis of carbamates prepolymer, according to weight
19 parts of polyether polyols of percentage are pure and mild is added according to 14 parts of diphenylmethane diisocyanates (MDI) of weight percent for amount.It is long
Bis- (2,4, the 6- trimethylbenzoyl) phosphine oxides of the phenyl of wave (405nm) initiator are added as photoinitiator, with solid
Change acrylic ester compound.
Here, the first adhesive layer 510 and the second adhesive layer 520 are referred to as example, and can be changed to have and be glued
Property and Low rigidity without to adherend bending section apply stress other materials.
In bonding part 1000 according to a first embodiment of the present invention, the first adhesive layer 510 and the second adhesive layer 520 can be with
Low rigidity having the same, and metal plate 500 can have the rigidity higher than the first adhesive layer 510 and the second adhesive layer 520.
Fig. 6 is the curve for showing the strain-stress relation of the metal plate and other materials for bonding part of the invention.
As shown in fig. 6, metal plate 500 of the invention has the elasticity modulus of 10GPa to 100GPa, the bullet of metal plate 500
Property modulus be to be determined by stress/strain, the stress of compressive strength and tensile strength has proportional to elasticity modulus linear
Variation tendency until the predetermined strain relative to compression and the stress of tensile strength, and then lost on predetermined strain to
Fixed pattern.Here, strain indicates (variation-original length increased or reduced)/original length.This means that according to the present invention
The stress of metal plate response compressive strength and tensile strength with certain elasticity modulus, until scheduled strain, without moulding
Property deformation.
On the other hand, such as the material of the metal of titanium or high rigidity stainless steel (such as SUS301) is strong relative to compression
The stress linear change of degree and tensile strength has the strain increased on predetermined strain until scheduled strain, i.e.,
Increase stress slightly.Especially, when titanium has 0.5% strain, the variation of stress/strain is biggish, it means that when
When 400MPa or bigger stress are applied on titanium, expendable variation occurs.
Meanwhile stainless steel keeps the stress/strain relationship of compressive strength or tensile strength to be in 1% or smaller strain
It is linear, but with bigger strain variation when strain on 1%.That is, when 1600MPa or bigger stress are applied
When stainless steel be subjected to expendable variation.
In addition, stainless steel has the stress/strain ratio of the tensile strength of about 160GPa and answers 1% or smaller
Elasticity modulus quite high region when change.When this is converted into rigidity, stainless steel has quite high rigidity, this is aobvious with flexibility
It is unusual height that the stress generated when display screen is folding or bending over, which is compared,.Therefore, stainless steel cannot be according to display panel or backboard
Compression and expansion follow length variation and even if be patterned due to itself high intensity cause from the display panel on top or under
The problem of backboard in portion slips.
Meanwhile metal plate of the invention includes the metal with high elastic modulus of the basic material as bonding part 1000
Plate (62.5GPa in Fig. 6), due to increase when being used as patterned form bending strength, since the characteristic of metal does not have
It having time stress relaxation and not will lead to plastic deformation, its original be promptly restored to when so that removal folding stress after folding
Beginning state.
That is, being formed in multiple in bonding part 1000 according to a first embodiment of the present invention means with face when folding
Gravitation etc. deposit when being applied on the patterned bonding part 1000 between adherend (100 referring to Fig. 2 and 3 and 200)
In multiple shape holding parts, this shows the small strain due to bonding part 1000, and bonding part 1000 is easy to be restored to its original
State.
Fig. 7 A is the cross-sectional view for showing bonding part according to a second embodiment of the present invention, and Fig. 7 B is the variation for showing Fig. 7 A
Exemplary cross-sectional view.
As shown in Figure 7 A, bonding part 2000 according to a second embodiment of the present invention includes the metal plate with cavity 505
500, with include corresponding first adhesive layer 610 of the whole surface of first surface and cavity 505 of metal plate 500 and filling gold
Belong to the second adhesive layer 620 of the cavity 505 of plate 500.
In some cases, as shown in Figure 7 B, modified example according to a second embodiment of the present invention is forming bonding part
When 2000, the second adhesive layer 620 can also be formed on the second surface of metal plate 500.According to a second embodiment of the present invention
Modified example is identical as second embodiment, and other than the formation of the second adhesive layer 620, identical configuration be will not be described again.
Here, it when the first adhesive layer 610 of bonding part 2000 as shown in Figure 7 A is towards the first binding (not shown), fills out
The second adhesive layer 620 for filling cavity 505 can be bonded to the second binding (not shown), so that the second adhesive layer 620 is with island
Form the second binding (not shown) of direction.
Fig. 7 C is to show the exemplary cross-sectional view of the variation of Fig. 5.
As seen in figure 7 c, corresponding with metal plate 500 in modified example according to a first embodiment of the present invention, first is viscous
Layer 530 is closed to be patterned.It means that the first adhesive layer 530 has and the cavity same shape that is arranged in metal plate 500
Hole.Modified example according to a first embodiment of the present invention can be for example viscous by forming second in the whole surface of backboard 200
It closes layer 540, be subsequently placed with metal plate 500 and adhesion-layer materials (layer identical with 530) and with same mask to being formed by
Structure, which is separated-is patterned so as to, subsequently forms metal plate 500 with cavity 505 and the first adhesive layer 530 to implement.
In addition, by the position for changing shape and patterned adhesive layer as seen in figure 7 c, second contacted with backboard 200
Adhesive layer 540 can be patterned, and the first adhesive layer 530 can be in shape shape corresponding with display panel 100 shown in Fig. 2
At on the whole surface.
Meanwhile about the bonding part being shown in plan view relevant to the embodiment of the present invention, the cavity of metal plate 500
Dumbbell shape is presented in 505 plane, it is shorter along folding axis, and longer along the direction intersected with folding axis.This makees
It is provided for an example, and can be used with the short width along folding axis and along intersecting with folding axis
Any shape of the length in direction.Here, folding is to be carried out based on folding axis, and edge is compressed and extended when folding
Its occur direction be direction intersect with folding axis so that cavity 505 with its grow length intersect with folding axis
Direction be formed repeatedly, so as in compression/contracted length direction advantageously generates in multiple and face.
In addition, when cavity 505 is arranged to multiple row, cavity in odd column with the cavity in even column staggeredly and
It mutually partly overlaps, to contribute to form multiple neutralization faces.
Meanwhile in the embodiment of bonding part above-mentioned, the metal plate 500 of the basic material (substrate) for bonding part has
There is about 10 μm to 20 μm of thickness, there is about 3 μm to 7 μm of thickness in the adhesive layer of even shape, so that metal plate 500
The integral, flexible and rigidity of bonding part 1000 are controlled based on thickness relatively high compared with adhesive layer 510 and 520.
In above-described embodiment (Fig. 7 A-7C), metal plate 500 has than the first adhesive layer 610 or 530 and the second adhesive layer
620 or 540 high rigidity.
Fig. 8 A shows the neutralization face of full surface type bonding part, and Fig. 8 B shows the neutralization of bonding part according to the present invention
Face.
As shown in Figure 8 A, when full surface type bonding part is by general curved, compression and the neutralization face extended are only formed
On middle face between the upper surface and lower surface of full surface type bonding part.In this respect, as shown in figure 5, of the invention is viscous
Conjunction portion is provided with cavity 505 in the direction by upper surface (first surface) and lower surface (second surface), so that Fig. 8 B's
The thickness direction of metal plate 500 generates multiple surfaces (n1, n2, n3), and compressive strength and extension strength occurs at this due to folding
Neutralization on multiple surfaces.As a result, the other compressions and stretching force that are applied are dispersed, so that when folding in metal plate 500
Upper surface (first surface) and lower surface (second surface) between difference in length become smaller, thus prevent fold when metal plate
500 deformation.Neutralization face is preferably formed in the length or width direction of cavity 505 in curved form, rather than linear
Form formed.
In the embodiment of above-mentioned patterned bonding part, the setting of cavity 505 is towards display panel 100 and backboard
200 whole region.But the present invention is not limited to this configuration, and the cavity property of can choose of bonding part be only arranged
Folding the specific region occurred.
Fig. 9 is to show the plan view of bonding part according to a third embodiment of the present invention and Figure 10 is the line along Fig. 9
The cross-sectional view of III-III ' interception.
As shown in Figures 9 and 10, bonding part 3000 according to a third embodiment of the present invention is only corresponding with fold domain FR
Region be provided with a plurality of cavities 705, and be arranged in remaining area (includes non-collapsible region UFR) in the thickness direction of metal plate 700
There is the metal plate 700 of filling.Moreover, the first adhesive layer 710 is further in the entire area including fold domain and includes non-collapsible region
It is formed at least one of the mutual opposite first surface and second surface of metal plate 700 on domain.Metal plate 700 have than
The high rigidity of first adhesive layer 710.
As described in first embodiment and second embodiment or their modified example, according to a third embodiment of the present invention viscous
The second adhesive layer can be further arranged in conjunction portion 3000, and filling cavity 705 or the second adhesive layer can be set into and difference
Towards the flat shape of the display panel 100 as backboard 200 on two surfaces of metal plate 700, or exclusion can be set
The patterned adhesive layer of cavity 705.
As described above, bonding part of the invention and the flexible display screen including bonding part have the following effects that.
Firstly, bonding part of the invention includes the metal plate as basic material and is arranged in metal plate mutual
Every cavity to form predetermined pattern, metal plate is not plastically deformed and the elasticity modulus with 10GPa to 100GPa so that
Multiple neutralization faces can be formed, compress and extend in folding process in and occur in multiple and on face, therefore, can be with
It prevents from deforming due to folding caused bonding part.
Second, when high rigidity material or common metal formation of the bonding part using such as stainless steel, restorative height, still
In response to this, stress is generated in display panel, disadvantageously results in cracking, when bonding part is using the weak rigid material of such as polymer
When material is formed, due to flexibility, display panel be will not cracking, but polymer needs one day or longer after receiving stress
Slack time is not suitable for flexible display screen to be restored to its reset condition.Bonding part of the invention is arranged as base
In the metal plate of this material, metal plate is moldable, without internal crystallization degree and has elasticity modulus not less than predeterminated level,
For example, liquid metal.Since the high restoring force of material and while folding, are formed for dispersing multiple neutralizations of applied stress
Face is applied to the power of the opposed surface of the bonding part between display panel and backboard, bonding part of the invention when in response to folding
Any slippage can be functioned without, is restored to reset condition due to high elasticity modulus and when removal folds stress
High restoring force, bonding part of the invention are advantageously applied to flexible display screen.
In addition, although the preferred embodiment of the present invention has been disclosed referring to attached drawing for illustrative purposes, for ability
Field technique personnel it is readily apparent that the present invention be not limited to configuration identical in specific embodiment, movement and effect, not
In the case where being detached from the spirit and scope of the present invention various modifications and variations can be carried out to the present invention.Therefore, this improvement and change
Change will fall into the scope of the present invention, and the real technical protection scope of the present invention is limited by the technical spirit of claim
's.
Claims (16)
1. a kind of bonding part, including metal plate, wherein the metal plate has mutually opposite first surface and second surface,
A plurality of cavities are arranged in the metal plate between the first surface and the second surface, so that when folding in institute
It states and forms multiple neutralization faces between first surface and the second surface.
2. bonding part as described in claim 1, which is characterized in that the metal plate has scheduled elasticity modulus, and not
It will lead to plastic deformation.
3. bonding part as claimed in claim 2, which is characterized in that the metal plate is elasticity modulus in 10GPa to 100GPa
Liquid metal plate.
4. the bonding part as described in claims 1 to 3 is any, which is characterized in that further include being arranged on the metal plate or institute
State at least one of the first adhesive layer and the second adhesive layer in metal plate.
5. bonding part as claimed in claim 4, which is characterized in that first adhesive layer and second adhesive layer respectively by
It is arranged on the first surface and the second surface of the metal plate.
6. bonding part as claimed in claim 5, which is characterized in that first adhesive layer and second adhesive layer are by piece
Form provide；First adhesive layer and second adhesive layer are formed only into the first surface and the second surface
The upper metal plate retains but excludes the region of the cavity；Or one in first adhesive layer and second adhesive layer
It is a in the form of piece and another is in the sheet for excluding the cavity.
7. bonding part as claimed in claim 4, which is characterized in that first adhesive layer is arranged on the first surface
On, second adhesive layer fills the cavity；Or first adhesive layer is set on the first surface, described
Two adhesive layers are filled the cavity and are arranged on the second surface.
8. the bonding part stated such as claim 4, which is characterized in that the multiple cavity is provided only on corresponding with the fold domain
Region, and first adhesive layer is provided in remaining area.
9. bonding part as claimed in claim 4, which is characterized in that first adhesive layer and second adhesive layer are including poly-
Chlorinated polyethylene or epoxy resin are as basic binder resin.
10. bonding part as claimed in claim 4, which is characterized in that the metal plate has than first adhesive layer and institute
State the high rigidity of the second adhesive layer.
11. bonding part as claimed in claim 4, which is characterized in that the metal plate has about 10 μm to 20 μm of thickness,
And there is about 3 μm to 7 μm of thickness in first adhesive layer of even shape and second adhesive layer.
12. bonding part a method according to any one of claims 1-3, which is characterized in that the plane of the cavity is in along folding axis
It is shorter and along the longer dumbbell shape in the direction intersected with folding axis.
13. bonding part a method according to any one of claims 1-3, which is characterized in that the cavity is arranged to multiple column, in odd column
In the cavity and the cavity in even column mutually overlap staggeredly and partly.
14. bonding part a method according to any one of claims 1-3, which is characterized in that the bonding part is arranged on flexible display screen
Display panel and backboard between it is flexible aobvious so that the display panel and the backboard to be bonded together and/or be provided at
Between the coating and touch electrode array of the display panel of display screen.
15. a kind of flexible display screen, including display panel, backboard and the bonding part as described in claim 1-13 is any.
16. flexible display screen as claimed in claim 15, which is characterized in that the bonding part is arranged on the display panel
Between the backboard so as to be bonded together and/or be provided at flexible display screen display panel coating with
Between touch electrode array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210050339.7A CN114283693A (en) | 2017-11-30 | 2018-11-23 | Flexible display screen |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2017-0163548 | 2017-11-30 | ||
| KR1020170163548A KR102590012B1 (en) | 2017-11-30 | 2017-11-30 | Adhesive and Flexible Display Using the Same |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210050339.7A Division CN114283693A (en) | 2017-11-30 | 2018-11-23 | Flexible display screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110009996A true CN110009996A (en) | 2019-07-12 |
| CN110009996B CN110009996B (en) | 2022-02-08 |
Family
ID=64604424
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210050339.7A Pending CN114283693A (en) | 2017-11-30 | 2018-11-23 | Flexible display screen |
| CN201811404763.7A Active CN110009996B (en) | 2017-11-30 | 2018-11-23 | Bonding portion and flexible display screen |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210050339.7A Pending CN114283693A (en) | 2017-11-30 | 2018-11-23 | Flexible display screen |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US11258037B2 (en) |
| EP (1) | EP3493288B1 (en) |
| KR (2) | KR102590012B1 (en) |
| CN (2) | CN114283693A (en) |
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| CN112951084A (en) * | 2019-12-10 | 2021-06-11 | 乐金显示有限公司 | Foldable display device |
| CN114582230A (en) * | 2020-12-02 | 2022-06-03 | 乐金显示有限公司 | Display device |
| CN115103763A (en) * | 2019-12-17 | 2022-09-23 | 法国电力公司 | Macro-stiffness tunable intermediate deformation layer for bonded assemblies |
| CN115294873A (en) * | 2022-08-26 | 2022-11-04 | 科迪华显示技术(绍兴)有限公司 | Foldable display panel and method of manufacturing the same |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20190064183A (en) | 2019-06-10 |
| KR102590012B1 (en) | 2023-10-16 |
| EP3493288B1 (en) | 2021-07-21 |
| US11258037B2 (en) | 2022-02-22 |
| EP3493288A1 (en) | 2019-06-05 |
| US20220135728A1 (en) | 2022-05-05 |
| US20190165311A1 (en) | 2019-05-30 |
| CN114283693A (en) | 2022-04-05 |
| CN110009996B (en) | 2022-02-08 |
| KR20230148300A (en) | 2023-10-24 |
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